Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2701
CALL
Amcor
AMCR
$20.6B
| $884K | ﹤0.01% |
15,540
-2,900
| -16% | -$166K |
|
2702
PUT
Crown Holdings
CCK
$12.8B
| $884K | ﹤0.01% |
10,700
-55,600
| -84% | -$4.7M |
|
2703
PUT
Ormat Technologies
ORA
$6.11B
| $881K | ﹤0.01% |
10,400
+7,100
| +215% | +$623K |
|
2704
PUT
Roper Technologies
ROP
$36.3B
| $881K | ﹤0.01% |
2,000
-1,200
| -38% | -$519K |
|
2705
CALL
Western Midstream Partners
WES
$19.6B
| $880K | ﹤0.01% |
33,400
-49,200
| -60% | -$1.32M |
|
2706
CALL
Upbound Group
UPBD
$1.19B
| $879K | ﹤0.01% |
35,900
+28,800
| +406% | +$741K |
|
|
SMAR
2707
PUT
DELISTED
Smartsheet Inc.
SMAR
| $879K | ﹤0.01% |
18,400
+8,400
| +84% | +$365K |
|
2708
CALL
American Water Works
AWK
$26.3B
| $878K | ﹤0.01% |
6,000
+1,300
| +28% | +$193K |
|
2709
HF Sinclair
DINO
$15.9B
| $877K | ﹤0.01% |
18,142
+13,229
| +269% | +$688K |
|
2710
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$100M
| $876K | ﹤0.01% |
+13,862
| New | +$938K |
|
2711
PUT
Altimmune
ALT
$539M
| $874K | ﹤0.01% |
207,300
+139,300
| +205% | +$1.65M |
|
2712
PUT
Guardant Health
GH
$19.5B
| $874K | ﹤0.01% |
37,300
-40,300
| -52% | -$1.15M |
|
2713
Republic Services
RSG
$66.7B
| $874K | ﹤0.01% |
6,468
+4,729
| +272% | +$603K |
|
2714
CALL
Virtu Financial
VIRT
$5.2B
| $873K | ﹤0.01% |
46,200
-32,900
| -42% | -$632K |
|
2715
PUT
SSR Mining
SSRM
$5.57B
| $870K | ﹤0.01% |
57,600
+36,600
| +174% | +$558K |
|
2716
CALL
STAAR Surgical
STAA
$1.16B
| $869K | ﹤0.01% |
13,600
-17,300
| -56% | -$1.13M |
|
2717
CALL
Teekay
TK
$975M
| $869K | ﹤0.01% |
140,700
+126,800
| +912% | +$678K |
|
2718
PUT
Blue Owl Capital
OBDC
$5.35B
| $868K | ﹤0.01% |
68,900
+43,000
| +166% | +$553K |
|
|
VTLE
2719
DELISTED
Vital Energy
VTLE
| $867K | ﹤0.01% |
19,054
+7,391
| +63% | +$369K |
|
2720
PUT
Rogers Corp
ROG
$2.33B
| $866K | ﹤0.01% |
5,300
+400
| +8% | +$57.7K |
|
2721
CALL
Shoals Technologies Group
SHLS
$1.58B
| $866K | ﹤0.01% |
38,000
+34,700
| +1,052% | +$856K |
|
2722
Enovix
ENVX
$862M
| $864K | ﹤0.01% |
66,251
-105,758
| -61% | -$868K |
|
2723
PUT
4D Molecular Therapeutics
FDMT
$526M
| $864K | ﹤0.01% |
50,300
+49,900
| +12,475% | +$970K |
|
2724
PUT
Henry Schein
HSIC
$9.74B
| $864K | ﹤0.01% |
10,600
+4,000
| +61% | +$326K |
|
2725
CALL
Cognex
CGNX
$10.3B
| $862K | ﹤0.01% |
17,400
-53,900
| -76% | -$2.73M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.